# Is the "set" conept in the roadmap (or is it not needed at all..)?

**URL:** <https://discourse.julialang.org/t/is-the-set-conept-in-the-roadmap-or-is-it-not-needed-at-all/1746>\
**Category:** Optimization (Mathematical)\
**Created:** [January 28, 2017, 8:48pm UTC](https://discourse.julialang.org/t/is-the-set-conept-in-the-roadmap-or-is-it-not-needed-at-all/1746 "2017-01-28T20:48:34Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![NickNack](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nicknack/32/1792_2.png) [@NickNack](https://discourse.julialang.org/u/NickNack)\
**Post date:** [February 4, 2017, 6:33pm UTC](https://discourse.julialang.org/t/is-the-set-conept-in-the-roadmap-or-is-it-not-needed-at-all/1746/7 "2017-02-04T18:33:26Z")

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Nice writeup, I wish I had something like that to peek at last week when I started playing with Julia/JuMP. However, I am now leaning towards using Named Arrays instead of Dicts for model parameters and variables. [I posted some benchmarks here](https://discourse.julialang.org/t/performance-of-namedarrays-vs-dictionaries-of-tuples/1854) and found that Named Arrays performed significantly better. Dicts are probably fast enough though in most cases unless your optimization model is huge. But since I also build simulation models which do a lot of iterated assignments I wanted the extra speed.

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